Furnace for smokeless combustion



(NoModel.) I' ZIS'heetsfSheet'l. M. M. ARMSTRONG.

PURNAGE PoR sMoKELEssooMBUsTIoN. No. 577,63'7, Patented Peb. 23, 1897.

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M. M. ARMSTRONG. FURNAGB FR SMOKELBSS OMBSTION. N0.r 577,637.

Patented Peb. 23, 1897.

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rares MEYLERT M. ARMSTRONG, OF PHILADELPHIA, PENNSYLVANIA.

FURNACE FOR SMOKELESS COMBUSTION..

SPECIFICATION forming part of Letters Patent No. 577,637, dated AFebruary 23, 189'?.

Application filed April 18, 1894. Renewed July 31,1896. Serial No. 601,206. (No model.)

T0 all wtmn/ it' 'lmty concer/t:

Be it known that I, MEYLERT M. ARM- STRONG, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have 'invented certain new and useful Improvements in Furnaces for the Smokeless Combustion of Fuel and Generation of Steam; and l do hereby declare the following to be a sufliciently full, clear, and exact description thereof as to enable others skilled in the art to make and use the said invention.

This invention relates to furnaces for the smokeless combustion of fuel, is specially applicable to furnaces for generating steam, and has for its object the continuous feeding and complete utilization of the fuel.

To this end this invention consists in the combination and arrangement of the following devices: a fuel-supplying hopper or magazine, a vertical or inclined fuel-chamber with refractory perforated or water-tube walls and a fuel-supporting grate or grates, an air-supply chamber, a return-draft chamber, and arched or perforated wall for the passage of gases in combustion to the steam-boiler or other apparatus to be heated. y

rIhe construction and arrangement of the apparatus and the method of operating the same are fully hereinafter described, and shown in the accompanying drawings, in which- Figure l shows a sectional elevation of the setting of an upright water-tube boiler with this invention applied thereto; Fig. 2, a sectional elevation of the setting of an inclined water-tube boiler with this invention applied toit; Fig. 3, a sectional elevation of the setting of a horizontal flue-boiler with this invention applied thereto; Fig. 4, a sectional elevation of a Vertical flue-boiler with the invention applied thereto; Fig. 5, a sectional elevation of an upright fine-boiler with a furnace Vembodying this invention internally applied thereto, and Fig. 6 shows a front view of the fuel-chamber with modifications in parts thereof.

1 represents a hopper or magazine to supply coal or other fuel; 2, a fuel-chamber placed below the hopper or magazine 1 and receiving fuel therefrom. The sides of the chamber 2 may be either vertical or of such inclination as to permit the fuel to slide downwardly in it as it is consumed. The sides of the fuel-chamber 2 may be made of watertubes 3, connected with a water-supply pipe 4. at the lower part, receiving water from the boiler 5 through a connecting-pipe 6, and the upper ends of the water-tubes 3 are connected by pipes 7 with the boiler 5, so that any steam generated in the pipes 3 is conveyed to the boiler 5. The tubes 3 are arranged with airdraft spaces between them similar to a tubular grate. Air enters by a chamber 8 and passes through and across the fuel in the chamber 2 into a chamber 9, whence it returns by again passing through the fuel in the chamber 2 at a lower point than before, and thence the products of combustion pass through an archway or other form of outletchamber 10,having suitable perforations leading into the combustion chamber l1, and passes through the boiler 5 to the chimneyiiue 12, imparting heat to the boiler, the said chamber 10 being separated from the air-inlet chamber 8 by a partition-wall 10a.

A grate 13 is placed at the base of the chamber 9, which receives the fuel and ashes that fall between the tubes 3, and the combustible portion burns "with air drawn through the door l5. The ashes fall through the grate into the ash-pit 14.

In front of the chamber 9 doors 16 and 17 are placed, lined with refractory non-conducting material 18 and 19. By opening these doors the apparatus lcan be inspected and cleaned. Instead of water-tubes 3 the chamber 2 may be made of blocks 22 of refractory material with apertures 20 between or in them, as shown in Fig. 4 and in the right side of Fig. 6, or of water-tubes 21 combined with blocks 23 of refractory material, as shown at the left side of Fig. 6.

The operation of this invention is as follows: A fire is built in the chamber 2, which is filled from the magazine 1 with fuel, and a sufficient supply of fuel placed in the magazine to keep the chamber 2 full and exclude air from entering at the top. Air is admitted from the chamber 8, and passing across and through the fuel in the upper part of the chamber 2 combines with part of the fuel and emerges with combustible gases into the chamber 9, whence it passes, together with IOO the products of combustion of the fuel on the grate 13, again through the fuel in the lower part of the chamber 2, and thence in a state of complete smokeless combustion enters the boiler-setting and imparts heat to the boiler 5. Air or air and steam may be introduced by injectors 24 or other appliances, as shown -in Figs. 4 and 5.

It is obvious that by increasing the number of chambers 9 and placing them serially on opposite sides of the fuel-chamber, so as to successively discharge through the fuel into each other, the products of combustion may be compelled to pass through the fuel-chamber and fuel several times instead of twice.

Having described my invention, what I claim isl. In an apparatus for smokeless combustion of fuel, a magazine or hopper for charging fuel, a fuel-chamber placed below and fed from said magazine, and having apertures upon both sides, an air-inlet chamber communicating with the upper part of one side of the fuel-chamber, and a gas-outlet in the lower part thereof, in combination with a second chamber 9 on the opposite side of the fuel-chamber, arranged to receive products of combustion from the upper part of the fuel-chamber, and return them through the lower part of said fuel-chamber, substantially as and for the purpose set forth.

2. In an apparatus for smokeless combustion of fuel, a fuel-magazine, a fuel-chamber, having perforations on both sides and located below and arranged to be continuously fed by said magazine, a chamber arranged to admit air upon the upper portion of one side of said fuel-chamber, a chamber to convey gaseous products of combustion from the lower part thereof, a chamber 9 arranged to receive products of combustion from the side of the upper part of said fuel-chamber and return them through the lower part thereof to the discharging-chamber, in combination with a grate and air-supplied ash-pit, a1'- ranged at the base of the returning-chamber to receive and to burn fuel falling from the fuel-chamber, substantially as set forth.

3. In a steam-boiler furnace, a magazine or hopper for charging fuel, a fuel-chamber placed below and fed from said magazine, and having apertures upon both sides, an air-inlet chamber S communicating with the upper part of one side of the fuel-chamber, and a gas-outlet l0 in the lower part thereof, in combination with a second chamber 9 on the opposite side of the fuel-gas outlet l0, arranged to receive products of combustion from the upper part of the fuel-chamber, and return them through the lower part of said fuel-chamber, said chamber being connected with a passage for the products of combustion, and a boiler located in the path of said products of combustion, substantially as set forth.

MEYLERT M. ARMSTRONG.

Witnesses:

J. DANIEL EBY, LAcEY L. OADWALLADER. 

